From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933065AbXBLH3h (ORCPT ); Mon, 12 Feb 2007 02:29:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933066AbXBLH3h (ORCPT ); Mon, 12 Feb 2007 02:29:37 -0500 Received: from gate.crashing.org ([63.228.1.57]:48812 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933065AbXBLH3g (ORCPT ); Mon, 12 Feb 2007 02:29:36 -0500 Subject: Re: remote debugging via FireWire From: Benjamin Herrenschmidt To: Andi Kleen Cc: Stefan Richter , Bernhard Kaindl , discuss@x86-64.org, linux1394-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org In-Reply-To: <200702120749.54976.ak@suse.de> References: <200702101242.48467.ak@suse.de> <45CE19F3.2070603@s5r6.in-berlin.de> <1171229738.20494.60.camel@localhost.localdomain> <200702120749.54976.ak@suse.de> Content-Type: text/plain Date: Mon, 12 Feb 2007 18:29:07 +1100 Message-Id: <1171265347.20494.74.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.8.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2007-02-12 at 07:49 +0100, Andi Kleen wrote: > On Sunday 11 February 2007 22:35, Benjamin Herrenschmidt wrote: > > > I'd like to have that on ppc as well, so I'd rather keep it in drivers/ > > This will need some abstraction at least -- there are some early mapping hacks > that are x86 specific right now. Either abstraction or ifdef's .. we have ioremap working very early on ppc :-) > > I agree that it doesn't need to be a module. If you can load modules, > > then you can load the full ohci driver. Thus, if it's an early thingy > > initialized by arch, it can export a special "takeover" hook that the > > proper ohci module can then call to override it (important if we start > > having an irq handler). > > > > Andi, also, how do you deal with iommu ? Not at all ? :-) > > Yes -- it's really early debugging hack mostly. It's reasonable to > let the iommu be disabled (or later a special bypass can be added for this) Ok. Ben.